What is the norm / good strategy to find and contact the professors in NAACL that I'm interested in PhD?

I'm going to attend NAACL '22. I'm wondering how to find the professors that will attend in NAACL (it's easy to know how give workshop and talks, but not that easy to know who will just attend) and how to contact the ones I'm interested in PhD (e.g. cold email to have virutal/in-person coffee chat) ?

good languagetechnology naacl phd strategy